7mm SAUM vs .375 CheyTac
A to-scale size comparison of the 7mm SAUM and the .375 CheyTac, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
7mm SAUM (left) beside .375 CheyTac (right), shown at the same scale.
The 7mm SAUM has an overall length of about 2.83″ with a 0.284″ bullet. The .375 CheyTac runs about 4.46″ on a 0.375″ bullet. That makes the .375 CheyTac about 1.6x the overall length of the 7mm SAUM. See the full reference for each: 7mm SAUM and .375 CheyTac.